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AB shall be at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from which draw FG in the plane DE at right D angles to CE ; and because AB is , perpendicular...
The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ... - Side 211
av Robert Simson - 1775 - 520 sider
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## The Elements of Euclid, the parts read in the University of Cambridge [book ...

Euclides - 1846
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from...which draw FG, in the plane DE, at right angles to CE : Then, because AB is at right angles to the plane CK, therefore it makes right angles with every straight...
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1847 - 317 sider
...right angles to the plane CK Let any plane DE pass-through AB, and let CE be the common section ot the planes DE, CK ; take any point F in CE, from which...draw FG in the plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line...
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## An elementary course of mathematics, Volum 2

Samuel Hunter Christie - 1847
...plane MN. Let any plane DE pass through AB, and let CE be the common section of the planes DE, MN; take any point F in CE, from which draw FG in the plane DE at right angles to CE (I. 11). Because AB is perpendicular to the plane MN, therefore it is also perpendicular to every straight...
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## The Elements of Euclid, with many additional propositions, and explanatory ...

Euclides - 1855
...angles to that plane. DEMONSTRATION. Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from...which draw FG, in the plane DE, at right angles to CE (a): and because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight...
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## Elements of Geometry: Containing the First Six Books of Euclid with a ...

John Playfair - 1856 - 318 sider
...right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section rf the planes DE, CK ; take any point F in CE, from which draw FG in ae plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is...
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## The Elements of Euclid with Many Additional Propositions and Explanatory Notes

Eucleides - 1860
...plane. DEMONSTRATION. Let 3> G- A. & any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F in CE, from...which draw FG, in the plane DE, at right angles to CE (a) : and because AB is perpendicular to the plane CK, therefore it is also perpendicular to every...
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## The school edition. Euclid's Elements of geometry, the first six books, by R ...

Euclides - 1864
...right angles to the plane CK. DGAH Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; take any point F in CE, from...which draw FG in the plane DE at right angles to CE. (I. 11.) And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every...
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## The college Euclid: comprising the first six and the parts of the eleventh ...

Euclides - 1865
...angles to tne plane CK. CONSTRUCTION Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK ( take any point F in CE, from...which draw FG in the plane DE at right angles to CE. (i. 11.) DEMONSTRATION And because AB is perpendicular to the plane CK, therefore it is also perpendicular...
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## The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 sider
...B Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; [XI. 3. ^take any point F in ' CE, from which draw FG, in the plane DE, at right angles to CE. [I. 11. Then, because AB is at right angles to the plane CK, [Hypothesis. therefore it makes right...
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## The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 sider
...CK. H Let any pkne DE pa*= through AB, and let CE be the common section of the planes DE, CK; [XI. 3. take any point F in CE, from which draw FG, in the plane DE, at right angles to CE. [I. 11. Then, because AB is at right angles to the plane CK, [Hypothesis. therefore it makes right...
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